Adding conventional oil to Brad Penn?
 

I have always wondered if there is any harm in adding a quart of conventional oil, non-Brad Penn, but same weight as BP (20W50), if you typically always use Brad Penn?

So if one was on a long trip, didn't have BP to add, but wanted to add a little oil to the case, would you add conventional 20W50? Or is that a bad idea?

Curious....

No problems will occur. BP is a partial synthetic if my memory is correct, even if it wasn't there is no real cause for concern.

yes you are right .. BP is partial synthetic ... if i have to add on trips I throw in a quart of Valvoline 20W50 VR1 racing oil . no issues at all .

Valvoline VR-1 20w 50 is so much better than that sludge forming brad pen BS it's ridiculous. ...you couldn't pay me to use that over rated bradd pitt swamp piss again in a turbo motor.
Been there done that and learned.. it can't take the heat of a turbo bearing housing and turns to carbon sludge turning the inside of the motor black with carbon sludge in less than 1000 miles.
Clean out the sludge in the cam towers, valve covers, and chain cases and then use Valvoline VR-1 non synthetic or full synthetic 20w 50 or best of all: Mobil One 15w 50 and everything stays clean..

If you want a full synthetic that has nearly identical additives as BP, Amsoil Z-Rod is the way to go....

FWIW, in my non-turbo car, I have never had a sludge problem with BP.

If it was me, I would be using a 100% group 4 or 5 syn oil for Turbo applications. After all synthetic oils were originally made to address the coking problems in jet turbine engines.

Someone asked me about the numbers for the Z-Rod oil.

Z-Rod contains 1440PPM of Zinc and 1320PPM of Phosphorous.